Patents by Inventor William S. Frei

William S. Frei has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5250251
    Abstract: A process for shaping parts from ceramic powder that comprises the steps of (1) forming a concentrated mixture in excess of 40% ceramic solids by volume, the mixture comprising ceramic powder, a gel forming material chosen from the class of polysaccharides known as "agaroids", and a gel forming material solvent and being formed in a blender that provides a shearing action and is heated to raise the temperature of the mixture to about 70.degree. C. to 100.degree. C.; and (2) molding the mixture at a temperature sufficient to produce a self-supporting structure comprising the powder and gel. The parts exhibit excellent green strength and are rapidly fired without cracking, distortion or shrinkage problems.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: October 5, 1993
    Assignee: AlliedSignal Inc.
    Inventors: Anthony J. Fanelli, Gary B. Marsh, Joan V. Burlew, Clifford P. Ballard, William S. Frei